/* 轮播图 */
#container {
    width: 1380px;
    height: 350px;
    margin: 20px auto 0;
    position: relative;
    overflow: hidden;
}
#container ul {
    position: absolute;
}
#container ul li {
    list-style-type: none;
    float: left;
    width: 1380px;
    height: 350px;
}
#container ul li img {
    width: 100%;
    height: 100%;
}
#prev_btn{
    position: absolute;
    top:45%;
    left:30px;
    z-index: 999;
    display: none;
    width:50px;
    height:50px;
    border:1px solid transparent;
    border-radius: 50%;
    outline: none;
    background: black;
    opacity: 0.6;
    color:white;
}
#next_btn{
    position: absolute;
    top:45%;
    right:30px;
    z-index: 999;
    display: none;
    width:50px;
    height:50px;
    border:1px solid transparent;
    border-radius: 50%;
    outline: none;
    background: black;
    opacity: 0.6;
    color:white;
}